Tobias Acid (2-Naphthylamine-8-sulfonic Acid) from Japan
Tobias acid is the sodium salt of 2-naphthylamine-8-sulfonic acid, widely used as a diazo component in manufacturing acid dyes and pigments. Classified under HTS 2922.21.4000 due to its status in additional U.S. note 3 to section VI, restricting imports for dye production. It qualifies as an oxygen-function amino-compound with amino, hydroxy, and sulfonic groups.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Confirm quota eligibility under additional U.S. note 3 and apply for import licenses through the Department of Commerce if required
• Include spectroscopic data and purity certificates to distinguish from similar naphthylamine derivatives during customs examination
• Package with stabilizers only as permitted by chapter note (f) to avoid reclassification as a preparation